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. 2015 Dec 30;6(3):623–629. doi: 10.1534/g3.115.025320

Table 2. Tests of zygotic and maternal suppression hypotheses.

Observed Females Males P valuea
C. nigoni × C. briggsae cbr-him-8/+b,c 353 1
Expected
Zygotic suppressiond 331.3 22.7 2.567 × 10−6
Maternal suppressione 353.3 0.7 0.685
a

P values from chi squared tests using the expected male frequencies for the zygotic and maternal suppression hypotheses described above.

b

C. nigoni EG5268 ♂♂ × C. briggsae cbr-him-8(v188)/+ I; stIs20120 [p-myo2::GFP] X, or C. nigoni EG5268 ♂♂ × C. briggsae cbr-him-8(v188)/+ I; stIs20120 [p-myo2::GFP]/+ X.

c

This cross is diagrammed in Figure 2E.

d

An expected male frequency of 6.4% was based on the expected 50% transmission rate of cbr-him-8(v188) from maternal heterozygotes and on the 12.8% frequency of viable adult XCbr males from cbr-him-8(v188) homozygous mothers.

e

An expected male frequency of 0.19% was based on the frequency of viable males obtained from crosses of C. nigoni males to wild-type C. briggsae hermaphrodites (Kozlowska et al. 2011).